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g R. P. GREENLEAF' LOADING MACHINE Filed July 17 1919 3 Sheets-Shut 1 Aug 12-, 1924.

R. P. GREENLEAF LOADING MACHINE Filed July 17. 1919 a Sheets-$110611? Aug. 12, 1924. 1,504,235

R. P. GREENLEAF LOADING MACHINE Filed July 17 1919 3 Sheets-Sheet 3 JCYw 676677.

Patented Aug. 12, 1924,

UNITED STATES PATENT OFFICE,

ROBERT P. GREENLHBF, OI CLEVELANB, OHIO, ASSIGNOB TO FRANK BILLINGS, OF CLEVELAND, OHIO.

LOADING MACHINE.

Application filed July 17,

To all whom it may concern.

Be it known that 1, ROBERT P, GREENLEAF, a citizen of the United States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new and useful lmproveniient in Loading Machines, of which the following is a full, clear, and exact description.

This invention relates to a loading ma chine of the type having a shovel designed to be thrust forward to receive a load and to be swung upwardly and rcarwardly over the machine to dump the material at the rear thereof.

The invention has for its principal object to provide a machine of this character which is extremely simple in construction, and durable, easy to construct and operate, and one wherein the working parts are not liable to be clogged by dirt or other materials being handled by the machine. Further the invention aims to provide in a machine of this type, a shovel elevating and swinging mechanism of a design and form such that the torque or turning moment exerted on the shovel is substantially proportional to the resistance to turning set up by the shovel, the effect being that during the early portion of the lifting movement of the loaded bucket, the turning irioinent exerted by the bucket shifting mechanism will be at a maximum and will gradually decrease as the shovel is swung over the machine and as the leverage through which the loaded shovel acts is gradually reduced.

The invention may be briefly siumnarized as consisting in certain novel details of construction, and combinatimis and arrange ments of parts which will be described in the specification and set forth in the appended claims.

In the accompanying sheets of drawings wherein I have shown one emboe f r ol the invention, Fig. 1 is a side view of the machine with the parts in the positions that they occupy at the beginning of the shovel filling or loading stroke; Fig. 2 is a top plan view of the same; Fig. 3 is a view similar to Fig. 1 on a reduced scale, showing the ram extended; Fig. l is a front view of the machine; Fig. 5 is a transverse sectional View substantially along the line 55 of Fig. 1; and Figs. 6 and '7 are side and plan views of a machine embodying a modification of my invention.

1919. Serial No. 311,591.

The machine includes a wheeled truck 10 on which are mounted the Working parts of the machine, these being in the form of a superstructure which can be turned about a vertical axis, the truck being in this case provided with arc-shaped tracks 11, and the superstructure with rollers 12 which engage the tracks and are guided thereon. The superstructure includes a forwardly and rearwardly moving part which carries the shovel and serves to advance and retract the shovel during the filling and discharging operations. Various forms of movable shovel carriers may be employed and various means for actuating this part may be employed. The movable shovel carrier is here inafter referred to as a ram, the term ram, however, should be understood to in clude any sort of forwardly and rearwardly movable support capable of performing the functions above referred to.

The body of the superstructure is in this instance formed by a rather long horizontal cylinder 13 of a fluid pressure motor which is designed to reciprocate forwardly and rearwardly a ram composed of a frontmember 14*, connected to the plunger 15 of the motor and two side members 16 which extend rearwardly alongside the cylinder 13, this ram beingtherefore substantially U- shaped. The side members 16 of the ram are each formed in this case of angles and plates, including three angles 16*, 16* and 16 with inwardly turned flanges and connected together by one or more plates 16.

This ram and the parts carried by it are supported and guided for forward and rearward reciprocating movement by rollers and tracks, including two track bars 17, secured to opposite sides of the cylinder 13, these track bars being engaged by upper and lower rollers 18 carried by the rear end of the ram and engaging the upper and lower faces of the bars, and the ram is further supported by forwardly disposed rollers 19 which are supported at the lower front por tion of the cylinder 13, and are engaged by the flanges of the lower angles 16 of the ram.

The ram is adapted to reciprocate, that is to say, to move forwardly and rearwardly a material conveying or loading element consisting of a shovel 20, which as here shown, is substantially triangular in shape, having an open front and a bottom plate, the front edge of which may be provided with teeth, and constitutes the digging or scooping part. This shovel is supported from the ram by swinging arms 21 which are connected to opposite sides of the shovel and which during the filling stroke, or at least the early part of the filling stroke, extend downwardly and forwardly, and at such time they rest upon bumpers or stops 22 which are carried by brackets 23 secured to the front side portions of the ram, which brackets may be adjusted to vary the inclination of the armswhile they are resting on the bumpers.

It will be observed that the shovel supporting and actuating arms 21 have extensions2l which in this instance are at substantially right angles to the arms, so that each arm with its extension constitutes in effect abell-crank. These arms 21 at their upper or inner ends 25, or at the junction of the arms and the extensions 21 there of, are pivotally mounted on pins or studs carried by a carriage or trolley 26, having rollers 27, designed to travel back and forth in guideways 28 inthe side members of the ram. The carriage or trolley 26 is composed of side members connected together at the front by a cross head 29, which is attached to thevplunger 30 01 a fluid pressure recip rocating motor 31 which is carried by the ram, and is in this case above the cylinder 13 of the lower motor which actuates the ram.

It will be seen from the description so far given, that when the lower motor is operated, the ram and all parts carried by it, including the shovel, shovel supporting arms, carriageor trolley 26, and upper niotor-Sl, are moved iorwardly or rearwardly. It will be seen also that when the upper motor 31 is operated, the carriage or trolley, the shovel and the shovel supporting arms are moved forwardly or rearwardly, or are given a movement of translation relative to the-ram.

During this movement of translation of the shovel and shovel supporting arms is desirable that the arms and shovel given a turning or rotary movement so that the shovel will be swung over the machine to dumping position, and back to d' position. It is in the mechanism to parting this turning movement, prefer simultaneously with the movement of translation, that the present invention resides particularly.

In a patent granted to Frank Billings and myself on the 26th day of November, 1918,

i No. 1,286,168, for a loading machine, which in some respects is similar to that constituting the subject matter oi this invention, the turning movement isimparted to the shovel arms during the movement of translation thereof by means of gear segments which 'oted to the side portions oi the rain impart the turning movement to the shovel fineness engage and roll over racks carried by ram.

in accordance with the present invention, turning devices are provided between the ram and the arms, the turning means dill'ering irom that in the Billings and Greenleat patent in the respect, broadly stated, that the turning device or means carried ay either the arm or ram cooperate with a given or certain point of the other part.

In the construction shown in g to 5, turning devices in the form of and arms, and in this instance these li co-operate with given or certain points the arms,-in this instance the free ends oi? the arm extensions 21 to which the links are pivotally connected.

l i hen the carriage is retracted, the tendency of these links is to resist the bacl? Ward movement of the carriage, shovel and shovel supporting arms, and as the carriage is pulled back by the motor 31, these links exert a turning effort on the shovel support ing arms, the torque depending, of ceurse, upon the effective leverage afforded by the arm extensions 21. This leverage is greatest While the shovel is traveling from its lowermost position upwardly to a position in front oil the machine or in line with the ram, and is at a maximum when the arm e1;- tensions 21 are at right angles to the linls 82, and is gradually reduced as the arm extensions 21 and links approach parallel ism. In other words, the turning efiort or torque exerted on the shovel supporting arms is greatest when the resistance to turn ing is at a maximum, due to the fact that the load of the shovel is acting through the maximum leverage. its the shovel is swung over the machine the leverage the load is gradually reduced until the shovel sup-- porting arms are vertical, but this condition is accompanied by a gradual reduction in the turning eilort or torque exerted the links 32, the two increasing and decreasing substantially proportionately desired to obtain a smoothly working and powerful. machine.

In operation the shovel is swung down wardly in front of the machine, and is given a forward filling stroke by the actuation of the motor which shifts the ram, or by the conjoint actuation of the ram open ing and carriage operating motors, the motors being operable either successively or simultaneousl When the shovel is tilled, and either in its lowermost position or partly elevated, the ram will retracted and during the retract-ion, or after retraction, the shovel will he swung npwui d and rearwardly over the machine so as to dump the contents thereof into a suitable receiving receptacle such as a mine car, this being done by the retraction of the carriage 36 through the up motor 31, and by the reaction of the links 32. After the shovel has been dumped it is swung downwardly and forwardly to digging position by moving the carriage forwardly to its foremost position in the guide slots or guide-ways of the rain, whereupon the operation may be repeated,

In addition to the fact that the particular shovel actuating mechanism here shown and described exerts a torque which is substantially proportional to the resistance to turning and lifting, the construction embodies the features of great simplicity, durability, and ease and low cost of construction. Furthermore, the parts are not liable to be deranged or clogged by dirt or other foreign matter.

In the modification shown in Figs. 6 and T, substantially the same results are obtained with a somewhat differentconstruction. lnstead of the links, I provide channelshaped guides 34: which are engaged by rollers at the free ends of the arm extensions 21.". These guides which may be in the form of castings, are secured to the ram by brackets 36. he grooves or. channels of the guides extend diagonally upward from a point below the guide-ways 28 of the rain along which the carriage or trolley moves to a point above the same, and in this instance the guides 3% provide curved paths for the rollers at the free ends of the arm extensions 21. These curved paths may be arcs of circles similar to the curved paths or arcs through which the axes of connection between the links 32 and arm extensions 21 travel in the construction first described, although l: do not regard it as essential that curved paths be provided or that these paths be in the form of arcs of circles if curved.

The construction may be otl'iemvise modit'od, for the frame and the reciprocating parts, such as the rain or carriage need not be. constructed as here shown, and while I "ave here illustratorv fluid pressure reciprorating motors which are preferably 01 erated by air, other types of motors may be utilized, such as rotary motors which can be operates by other scan: of power than air, such as electricity. 1 therefore aim in my claims. to cover all modifications which do not involve departure from the spirit and Jon scope of my invention in its broadest aspects,

having described my invention, 1 claim:

i. In a: loading lllilfil'llli? a frame, a ram movable forwardly and rearwardly with re s ot to the frame, a shovel adapted to be swung from in front of the machine upwardly and rcarwardly to dump material at the rear thereof, an arm connecting le shovel to the rain and mounted on the latter for ri'itary movement and for forward and rea :fwa rd movement relative thereto, the arm and rain having means comprising rigic. element connected to one part and engaging the other part at a certain or given point for imparting a rotary i'novenient to the arm in one direction when it is moved forwardly with respect to the ram and a rotary movement in the reverse direction when it is i'noved rearwardly with respect to the ram.

in a loading machine, a frame, a rain movable forwardly and rearwardly with respect to the a shovel adapted to be filled with material at the front of the machine and to be swung upwardly and rear wardly over the machine and back again to digging position, a member movable forwardly and rearwardly of the rain, an arm connected with the shovel and pivotally connected to said member, the arm and ram having means comprising a rigid element connected to one part and engaging the other part at a certain or given point for imparting a rotary inov inent to the arm in one direction when it is moved forwardly with respect to the rain and a rotary move ment in the reverse direction when it is moved rear ardly with respect to the ram.

3. In a loading machine, a frame, a rain movable forwardly and rearwardly with re spec to the frame, a shovel adapted to be filled with material at th: front of the machine and to be swung upwardly and rearwardly over the machine and back again to digging position, a member movable forwardly and rearwardly of the ram, an arm connected with the shovel and pivotally connected to said member, said arm and ran having means for imparting a turning movement to the arm when said member is moved forwardly or rearwardly relative to the rain, said n'ieans including a device carried by one part and co-operating with a given or certain point of the other part, said arn'r comprising a main portion extending from the shovel to said member, "id an extension projecting beyond the pirotal connection with said member and constituting a part of the turning means.

1-. In a loading machine, a frame, a. ram mo -able forwardly and rearwardly with respect to the frame. a shovel adapted to be filled with material at the front of the Ina-- chine and to be sv-rung over the machine to dump the ma erial at the rear tl'iereof', an arm connecting the shovel to the ram and adapted to he turned and to be given a forward ud rearward movement of trans lation relative to the ram, and means on the ram and co--o ;ierating with a given or f 5 2m to impart a turning movement to the arm during its movement of translation.

5. In a loading machine, a frame, a ram movable forwardly and rearwardly with respectto the frame, a shovel adapted to be filled with material at the front of the ma chine and to be swung over the machine to dump the material at the rear thereol'; an arm connecting the iovel to ram inl adapted to be turned and to be given a "forward and real ward movement ot translation relative to the rann and me ns on the ram and co-onerating;- with a given or certain point of the arm to in ing movement to the arm oart a tail during; its movea n hav' ment of translation as extension with which said Llili'lfi a: to be ,1 t dump the material a an arm connecting the shovel to the ram and adapted to be turned and to be given a forward and rearward movement of translaion relative to the ram, and j ram and co-operatingz with a i. certain point of the arm to impart a turning movement to the arm during movement of translation, said arm l song in H 7 form of a bell-crank and having one a. to extending to the shovel and another arm with which said means co-o'pe ates.

. 7. In a loading machine, a frame, a shovel adapted to receive a load at the front of the machine and to be swung over the machine to dump the material at the rear thereof, a rain movable forwardly and rearwardly of the frame, member movable forwardly and rearwardly with respect to the rain, an arm connecting the shovel to said member and an arm connected to the ram and co-operating with said first-named arm to tilt the latter and the shovel.

8. In a loading machine, a frame, a shovel adagted to receive a load at the front ot the machine and to be swung over the ma chine to dump the material at the rear thereof, a member movable forwardly and rearwardly to carry the shovel forwardly and rearwardly a shovel supporting; and, actuating arm connected to the shovel, means for moving said shovel and arm forwardly and rearwardly with respect to said membeiy, and means for causing a tilting or turning movementto be imparted to the shovel and arm during the movement relative to the said member comprising an arm connected to said member and cooperating with said loaning machine, a

- to receive a load at bble 'loiwardl and Yea-1'" wardly t i a member movable tor- F Y V wardiy ann real irdl v ot the re an arm cotimeeting the shovel to said meniband a second arm pivotally connecting sail named. arm to the ram and serving to exert a tuning effort on said (irshnained arm when the latte and, the shovel are given a oveinent of trans lion relative to the Hull.

11. In a loading machine, a frame, a shovel adapted to receive a load at the ti it of the machine and to be swung 1 machine to dn .ip the material tl thereof a rain movable forwardly an :1 wardlv a carriage movable forwa rely "ad 1' ar' ardl v of the ram an arm connectir j the shovel to the and having a extension, and a lint; connecting said tension to the rain. 7

l2. ln a loading machine, a frame, a shovel adapted to receive a load at the tront of the machine and to be swung 9 over the machine to dump the material at the rear therecut, t rain movable forwardly and rearwardlv of the rame, a trolley inov able torwardl and rearwardly oi? the rant a bell-crank pivoted to said trolley and having one part connected to the shovel, and a link connectin no other part of said bellcrank to the rant. whereby when the tij'ollev is given a movement of translation relativeto the rain a turning? etl ort is exerted on the bell-crank and shovel.

In testimony whereof l: hereunto attix mv signature i all ROBERT P. Mil/Ali 

